Add pocl.

Portable OpenCL aims to be an efficient open source (MIT-licensed)
implementation of the OpenCL 1.2 standard. pocl uses Clang as an
OpenCL C frontend and LLVM for the kernel compiler implementation,
and as a portability layer. Thus, if your desired target has an LLVM
backend, it should be able to get OpenCL support easily by using pocl.

PR:		171914
Submitted by:	O.Hartmann <ohartmann@walstatt.org> (based on)

1 files changed, 90 insertions, 0 deletions

diff --git a/lang/pocl/files/patch-lib_CL_devices_cpuinfo.c b/lang/pocl/files/patch-lib_CL_devices_cpuinfo.c
new file mode 100644
index 000000000000..1b7ce29b8034
--- /dev/null
+++ b/lang/pocl/files/patch-lib_CL_devices_cpuinfo.c
@@ -0,0 +1,90 @@
+--- lib/CL/devices/cpuinfo.c.orig	2016-11-20 11:31:19.521203000 +0100
++++ lib/CL/devices/cpuinfo.c	2016-11-20 11:29:24.502817000 +0100
+@@ -31,9 +31,13 @@
+ #  include "vccompat.hpp"
+ #endif
+ 
++#include <sys/types.h>
++#include <sys/sysctl.h>
++
+ #include "config.h"
+ #include "cpuinfo.h"
+ 
++#if 0
+ const char* cpuinfo = "/proc/cpuinfo";
+ #define MAX_CPUINFO_SIZE 64*1024
+ //#define DEBUG_POCL_CPUINFO
+@@ -152,8 +156,29 @@ pocl_cpuinfo_detect_max_clock_frequency(
+     } 
+   return -1;  
+ }
++#endif
++
++/**
++ * Detects the number of parallel hardware threads supported by
++ * the CPU.
++ *
++ * @return The number of hardware threads.
++ */
++ int
++pocl_cpuinfo_detect_compute_unit_count()
++{
++  int mib[2], nocpus;
++  size_t len;
+ 
++  mib[0] = CTL_HW;
++  mib[1] = HW_NCPU;
++  len = sizeof(nocpus);
++  sysctl(mib, 2, &nocpus, &len, NULL, 0);
+ 
++  return nocpus;
++}
++
++#if 0
+ /**
+  * Detects the number of parallel hardware threads supported by
+  * the CPU by parsing the cpuinfo.
+@@ -231,6 +256,27 @@ pocl_cpuinfo_detect_compute_unit_count()
+     } 
+   return -1;  
+ }
++#endif
++
++/**
++ * Detects the maximum clock frequency of the CPU.
++ *
++ * Assumes all cores have the same max clock freq.
++ *
++ * @return The clock frequency in MHz.
++ */
++int
++pocl_cpuinfo_detect_max_clock_frequency()
++{
++  //XXX PLEASE NOTE, THIS IS NOT TOO PORTABLE (AND/OR ACCURATE)!
++  const char mib[] = "hw.clockrate";
++  size_t size = sizeof(int);
++  int clockrate;
++
++  sysctlbyname(mib, (void *)&clockrate, &size, NULL, 0);
++  
++  return clockrate;
++ }
+ 
+ #ifdef POCL_ANDROID
+ 
+@@ -269,6 +315,7 @@ pocl_cpuinfo_get_cpu_name_and_vendor(cl_
+    * short_name is in the .data anyways.*/
+   device->long_name = device->short_name;
+ 
++#if 0
+   /* default vendor and vendor_id, in case it cannot be found by other means */
+   device->vendor = cpuvendor_default;
+   if (device->vendor_id == 0)
+@@ -317,6 +364,7 @@ pocl_cpuinfo_get_cpu_name_and_vendor(cl_
+   char *new_name = (char*)malloc (len);
+   snprintf (new_name, len, "%s-%s", device->short_name, start);
+   device->long_name = new_name;
++#endif
+ 
+ }
+